Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd337ab4367a1c03ecf5ef9a8724419bafe94eaa4f3c7c101e71a7dec953a0ccf' 
  AND token = 'ETBdnEsvNFOmOA7bD+irXjUKxJ4hCI/14H83tXSueao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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