Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00495d6fe035b34116f07f9c9986055e1faf40115b6431199048c09d6ec7da22' 
  AND token = '72/w0zIYJM9qw12Moh76x1mHAKMYkF28weQk6okvK9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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