Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5dcab165762f0241c11c9c52ee6ac6047ac9e10dabfca12e2b8faa19a2fe4ac8' 
  AND token = 'IxNdYFyYztbnyjW9gI/lgFNcY4diFwNQt31Yvt8+5sU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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