Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b711633315c24bd09ad12fe4163954f52d0df82caad205a6a6c2b241e160bd26' 
  AND token = '1oLAF2ZYGrJNixhBUvRWelWnZ9Q9o8EAvdu2u7ApFZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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