SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8c09e2d756b35c39b8eab883d24f705cf39292674b1755d1bf51cb8de684cda7' 
  AND token = 'lQm13IhJzreXUJOjL2CWRKmKhtVOg5E5QZkfE2zH6zw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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