SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '480010a74673252dc3d384f9179e5342fa13e73403627f41673acb6b6edb4ac1' 
  AND token = 'f7JZtYUawja8g9PQOsH1NTYZJbImcjX0DqLd7Rq08xU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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