Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '006a650b843e5ccce1dd92635cd646c659af4be84cf65f32334d4eb3c52874d8' 
  AND token = 'OPo57tIfESbbX6XeRbnn1osbPWEU1x9Bps7aM3qOEf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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