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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e25ab5c92c821d1818e81652ce5e8d86879f397b642196dd62338bd861ff0aa' 
  AND token = 'TWV9XN6kU6gj8WrUqCumMGHT52Dr5L7CIzQG+8KQHQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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