Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9351b161374cc9b98a835c6cea084194e7897437b847b37e86c833e50a2b09c9' 
  AND token = 'HhLcAdNZjE7ZYL9iAMe7Ty19yfvkxgjYmLVYSBd92Fw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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