Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5819b376be35cebdda1553e9cf787dfeab54a826fffebd92b2842dcce449b8d2' 
  AND token = 'jwkj4WRlpbXKUO4bIdEC0pPdCuFDE85YB8gXJz28RiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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