Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9ba45b2782304b1417c12d66953e700b21db56caaa45576822bd8c771f4b69a' 
  AND token = 'LfqHye7FrH2rL1fzIkfGVH01LJjHDMUbWV0zeAeoS9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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