Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61d08c506db45d76ea6d199d536d7cb1fc7f92b3e6b10f7c1860fb303e07ed3b' 
  AND token = 'HyjTVcLygXO6EP1pFktvybOWHDfWlGDnezQbAosRSrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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