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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41212605ba2b6413b47f7a747abe18394bd1337cc65090a63bd95cff629c4764' 
  AND token = '03jcrsK8YwUNH6/rcW8vp0rpmnk1wcHyIQxxQgMLS5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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