Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f398a9b4924f5acde9ea62a6c94ff83813837ff515a53aa30381e079acd8ea0' 
  AND token = 'wfIA/UAyoCN+NQM37GKZqUtUpHfJ3JXSXJcrmL0T+AQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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