Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53775e6da3c726d1b2c65d069558bbd1c37ee0f3abc632c41ee40d051ca61d60' 
  AND token = 'fkoIbLU+nJZkjqmCQu4UgAhhcbQ32saCPVaobHa0me4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}