Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38c42368a785c0d411c08b1f31721cd282d7fed0f70e9c98f038d1597238715e' 
  AND token = 'bG9EfJp6mdFvCOHD7uEFUvr41h5hykc+LJPl+Rrm3RI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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