SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3c33f05fda174094eb5644d8a6d14bab6e0599b4d35e6b7c858c0f7f7bd2ccfe' 
  AND token = 'D8W9ZF6dxGw5V/z90OSz+3Fh5MQ3tmZ2VXtJc7Wyl6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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