Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c630de8429e4cb38d46ed612ccb133de5a40505485688e153d3a36367170e27b' 
  AND token = 'KfefS3ZWtdGMr0lsLxGFTlJTj6KHszFymLY25rXB7aY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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