Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '547d362cea2c7544e844daa62648de8eb66c608f2e030d8ded23b8b12a3314fe' 
  AND token = 'iDFNppOrNJ/moZsejol033PxED/PJFbbDrgfWoE5IDo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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