Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd725de8fcfcc9ddcea55428016e1ce749f5381d0f557683b484404dffddd6e3f' 
  AND token = 'NomiSDcp/IyP6Z7DOADlwkCkarpdL3KoVZPMpFgyWdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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