Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd4a6e260efdbd24736e161d8fc732f3c803840d89a1b1d764ea120dbcacb5c40' 
  AND token = 'YMAcYAxpPsJxMwp0liCPCIdJRSa5gYe7YU3u9r8Ea6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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