Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebebdcec2ae8ecf292267c802f0187e9504df80e8d890f24ed3fc534408ec1ba' 
  AND token = 'KZolBKQu932q6jGGhB04kYGQRJS0htRq7otrcb5d3BA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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