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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '022d0c683af158df3e4e52411d562f59df4d60f5d67a9ac9ca0da6bcbf559d82' 
  AND token = 'aHqbfZf3OTmCA18Gih90o0HTnm4wBGwZZK5qtSQmkTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}