Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '158e5153f62b138431a2271bf31b88528608e44ff91acd0af2b9b60c8675baa0' 
  AND token = 'N1m8R4gYTx1b5ww0IpuxVmnEvb9EGNIU8gMNMI0UxX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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