Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6e062de82a8ecc37bfd92acc8e58df6be37021a5d5da157ed6be96d01f67588' 
  AND token = 'V5AdEKcp3Euzj4QpaFVWVYJp6Ep+arukXSwaK+QnJc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}