Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32e66c3b204cef1729317f8b5584ced27a0b3d562fca0188d5227ad291df3bea' 
  AND token = 'bbdyXqOshLJ0qFwBUbEW1opALTd7xMBYtdelKmBOE+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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