Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50819b4ff6e8046ad741d53c73c52ba0b29ffab250ab32343fea660350995f87' 
  AND token = 'm6EF10BF2hbr069Uu4qZS39Gp/fhatTvsT23f4oggFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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