Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '26ac7b69c91ff637bcaa1705eb60c8f62dfc8ff47c7d280f411f742392b933e0' 
  AND token = 'Gs9xi/oS45zyiuthNfnuRMlOETRdtQYj1u4wMOZNJQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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