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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c4390aae6108547a5979c83a578ca78645e5b898b0c3ebf72f056957ca675a9' 
  AND token = 'W2gM2sXbUu2KhsNBpvEOC0IF1+wW5FakVvMG7sffgFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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