SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8fa2725cef2caa845111498116686a5c88d73f64a554435bb93ed39257c3f3bc' 
  AND token = 'M9wwW2hjm1gwO26BYYE8d+pnzOK758Tr3V7v6YnxGvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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