Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caab0373b4d323a0d9e7c7784b525545cd200f5020a9f259ec75f6631549ab28' 
  AND token = 'S7NOetbXXg+2YxM6Jirb97VMmYqvsfVsgP1aL5QpUTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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