Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11fc45acf8690d704adc1ebbf57152e637a3487da18a988af50bc7ece905deff' 
  AND token = 'bvvXNO91uaGt19zADUetIHRz6uTvL27rzpa56HcjONs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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