Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d4376cda17aca05c601a8248b6af8f6dd7333b3cae9343dca2bc7259a2f6976' 
  AND token = '2QBtjTUP4O+0OpZozny58QIpIvscr4SmrCBX1VCy2L4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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