Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd97fee813f079dc49fcb91695e37dac6c041807a960404714cc4bc11356de374' 
  AND token = 'UCsF4TVq+k94o6b596YSQEWrAjci/5e4Au3HgTgMi1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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