Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd01c3254dc1f1cea1dd174795d6584cf1794863806fdb53bf3ea23f17baa728' 
  AND token = 'OJ8qYc1xtcp2Pk88jvJXyk2NjiOMC5VyTEI1QMFbUQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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