Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c46c6675bd0afd3fceed8406007e013883e0523feb431eb3b2c3fb412a0496e' 
  AND token = 'AvnAL5hpsd4SjkXJhyNxWvGK0DKmuxY5/0bMpi3DThE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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