Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa8eaf32daa00750cdbe09f7a2bdc877ddbc456f3e5135039e62c75391ef48c4' 
  AND token = 'v9U1OFz2gRQmiAWTzJ7vaELx6RQnzvNjPCrgbyyszL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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