Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0acc05af74d238d7ea14e9d1aaee9bb9d6f4d7ed87c66f6befafa6db12324bd' 
  AND token = 'c9Zpb6Cq6BB4L/QvQmqd4yu9xQ7LwWXelaOQGxsYkcA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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