Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7781c06abd751c486fde238b80a671a3d300e4eb21212b5b71b606cae6e9acc7' 
  AND token = 'H3FVgqgvdp+MoVtVqUyIR0XxQ17doYPLFsFkfMdZBWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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