Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd60a543d0152ed6b4480813699665a49f4774fb7ba0c28f63367ad2c4d2575e5' 
  AND token = 'AMJBW3+M6cjgaudgekgAKo8Xk20caO/PWcDNh/h6fyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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