Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18eaf580acc7da5aa6e8fa9f8bd4774464ebc73641a74773fd50a0544d957241' 
  AND token = 'vEpXqtSG6UCUtZkc16IedL2U7XJbRCkycXusykZ8/Bk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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