Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5e76c4575a6cc72d197b8465c1fc6a6c43a89feeeb1694545fc356c2437b7288' 
  AND token = 'hYvx53EDtLWuKMnSjsgL09/ccv8JETBNa/t1QQeaFxM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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