Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39f8b3db7a712110005f093728ac45d61a185b299bc04576f494ad7c3f0cb1ec' 
  AND token = 'xY/t9juLHsKZPx6Z9SnyOHvnMm4EKnb4B7BMaNRGDeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}