Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23334dc0ad813da91a2126cb23b8bceead1f9ee37240a8ca625a88842e27d986' 
  AND token = '5UyqvxeGk9A06TqH7XmTuBm5aQHFi0MLL0+s4TnsngA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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