Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4015f83d86d9ba5f4e9b4dc9c1a921aadc58fb19a154fea2cac32125f575635b' 
  AND token = 'dqKEXNvnKBtl1LFXlP99/0gdWAa+X6s1IQweaw9GkJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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