Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8fb0201514c3ffe24fd6f6071a3ac345c6635a1dd7a020d766165103f47a96e' 
  AND token = 'Lfh9/UOcsMm8rqDqWyOlhMqzPyxSY1gxdItLMJAcjp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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