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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a80d63c3b41fe1e9cbfbb9452d30df7d798aca7ad6a479af623bef04896efd2' 
  AND token = 'i80MbbLV7WmdqAY04wSbGTrPN75TGRf7YzEEYbEZZe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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