Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '374d15c911e38a8e34ff7da4755bb39fcb25c6fc2360f314de6b53d042f49375' 
  AND token = 'oVtHYku02VoWcCFL7fF3MBtv9W9ey+Of34n/C/O85kk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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