Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bf936436c96ddf26ca87a200fe301231cdca57c015a49c36d016aec97b358e3' 
  AND token = 'pMNu31HxS5Fvb/XllU57U6HS+bxfpG/9h3mM/KFzCAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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