SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb41ec50d84d5302ab8ed67ef8dbc2c8ad1075587caf5954fdb96dc745b625c2' 
  AND token = 'LA3SFmIgg/N0hKdH/BsXVCKY3MHExBnSsQw2tnGsjnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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