Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8360a0adbd04e5a8879860633ea2775c45e30c15892789d2b10893419a56d1c' 
  AND token = '8wTcIZnXXLiOVFuAwneLSceFeV9CbwNBCJnKwrZzitI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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