Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5a271f688a2388621753b0ab85bd9d20b8cf7f2b2a467ba515d92596d3a79ee' 
  AND token = 'yY/HxzivC+i7YTh0GVem5MDHjPVTNL82I6drkkZ0QnQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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