Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '768e8382da60078b15101748ad8a6b12d7b501f8b6706e8d4eadccedce8372c2' 
  AND token = '4KmX4u+vneBVyJgPx3/P7Ug5KwkX4OTZXLmvRrycfq4=' 
  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"
    }
  }
}