Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e23e8e294a9286e271626cfaa1ce35e3c8c2f2f15d8df911094dc31d89ea69d' 
  AND token = '0BmmlidNfbaSMzqFKRt2LqeP4wE4WAplPdfQAxuEols=' 
  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"
    }
  }
}