Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5aecee6a329611b22d34ee637f6bcfc7f18f0985b453ca5c37333a09cc757ea' 
  AND token = 'K1P6PLMdAUflq6uo2wPFJx6oIFOVkp7yXC30CDlpa6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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