Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a96345517270162c61f4dae3f56a6b52e874dfcc2b71eade6abb0ec0f9e77d6b' 
  AND token = 'cC1aVyTUSMerYDt/iNsGaor/+/bZMGBFXZbnJAsVRJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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