Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eca718f74c97a8540e716b81c2e83ef72471ed9e7cd843556fae96d986aff246' 
  AND token = 'FMsU6EyGrGMGYDD7NVv29VBq4cooZMZEJ8W4jrnxvR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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