Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f284049f7990348864b3bdf89a1c7464776728eb7e9b7769e15cc38e61255c86' 
  AND token = 'wRtGsqjlVgleIdaeZ92prDR28Xi9Qc1ZOAAjrq+WqdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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