Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a194336185761fd0cefb8d2ffc8273c67b4ede3593af911c35c178a6f59aca01' 
  AND token = 'xjx5atUbXS2RsBiSxulXSVRHwCnPDFhBBoKHUfxh67Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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