Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da6a82e66b0e61f2de76d6ceffbddb0ad02b7c77670ebee80e1028ce117a9c75' 
  AND token = 'DQNw9HnFyp+HIwruGVmLBSwBHCUW0AL8ce2osBUI8GE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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