Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ba83203a5f98699c524299162bdd960f359ab7cdacb37b2389536d9c9d97ce9' 
  AND token = 'dd8SuCTBiPP+fiXYBku28/3JKUhrEZlLjiCd2ey9eNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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