Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de5b135ff0f1bb5930cad787ad333045337fb53d3b1705b3fa4c259f53586d18' 
  AND token = 'ObPIgGu/FBgbcB+kg6G8WcRBNZiQoQ3qSW3o6yeKw6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}