Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0810fe5d171bd33d300e318e4182ba57ec792ce5ee2069bd9a537a31a063d210' 
  AND token = 'hB5YwoBI21tkmWYeG8/cpuYPZqt2Sh8zMVegiwtT9cM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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