SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '82299a9bc77d9386351be68b37320d7e13053dceeb79e7bac3d80f855cc6dfa6' 
  AND token = 'CYfatym9YZCXI6htJUZPV4Wrynrs0QCuzUYZw/1qoso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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