Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cec4e97a3255a08cd99f4566440465c15d7cc96dcf868c37cbe172d1e04ddb6f' 
  AND token = 'tnGS7eOW6rBOQU6FINZjWuwbz3xmNXO/AuLs9FLL5Ss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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