Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1011d4e0a78fe538f5f6305c9654fbfde4188187f2f5ad19d3476daccf0a52b' 
  AND token = 'MRmTXv1KGAshgxiueTRSwxdvEEvfealVt6m+xzdtIyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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