Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c0cfccbbe03460ada9a91d074dc5fb6f2bce411585849cf7c36bbdc7fe30a5a' 
  AND token = 'G7Eofs7QEZj7Y1X1NUx8RgE5/JJ8qIPGA/ozcmBPB7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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