Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c7df8530ba8519421fd92bb89d286951c579560f093b17053a9777708be5c32' 
  AND token = '/eqKY5FHfWNwnci+DnVzJPccWKmy2A56d3osBRN8hkk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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