Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33ddb7073506f302ca07ac05d56eda5ef08ea3bf3607f0c571c2622c9c2e4cb2' 
  AND token = '/OW6UEMfdcsypCYZWQDe8v9cixjuDrGDcI/OugRMFNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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