Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b5e40f6039da5f16371b88ef3b3a4aa9e38f67d41cf08cd4bca3bd292663ff9f' 
  AND token = 'org7oS5FIh33qS3eMp0QiXLMmvLTmCWr/sh6H+jt8ag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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