Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2915646f60f5b5c96319c365f3a031ea37edfe00ef54763c0495fa5de7bdc9d' 
  AND token = 'cOH9qgFtIl02FlLk4ObNFQm6dF5ZK1Ok3YWCByznr7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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