SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '181cf5d863294e3de917f32185c468ca74b638ec118a13fe9f7a3662d012dd2f' 
  AND token = 'kAETlXvmCAvutZZfmqb9GTbaXY/T5y1GuJ3HPhhSvAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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