Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4dc98a4b5d6d9a4762b951ff57294685c3e2be6dfb8872be9595855a8edaacc7' 
  AND token = 'dzZNSG6CFkG8QKWNqL4Q1JL9ZlbHFLZVm1eMeuIr23w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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