Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '179bdbe2c8cde50fe9af80781bfc6e7f84e619b7f5927655a0d09addbb0b4c99' 
  AND token = 'MsoFtLGiorqEkfPXJkVGzitLlYtGz5qO48FpvNB1Kl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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