Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df11fd5ac6b4602e39fcd1505a62114a55401cb2add6589bafbf933b18618344' 
  AND token = '3uKT1X8Mcq9RVQSAS5CytAYItoUjghqVw4znnnJU0hs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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