Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9246fae66665f807594cf71290d48dc4d7e8dc5e00461a44c92ec4edfa0f458' 
  AND token = 'P6084F7k3gLPfNr1ijeOGQplcs7EZn1e5i4RK1b8Kis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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