Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e742e55b14826349d7fe08c527b06500c4d4bc81855578604d31c5d50af2897f' 
  AND token = '1cPiItiGoGm+86Etnt+d+ckE6YxN8A+dwF6M5agoBC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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