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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a924a798ab738e20db9d2430ba0c257c130d2479d01bbca5ed89b346761170e' 
  AND token = 'wDq4+5nD4ru6i0w/CI3/s15mhoOXVfMoDaTGz0tCwuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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