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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '32148824da105cc7c366af455f17527c2bbd976caeadc7a3b43475e8269ecd20' 
  AND token = 'SryL7s5GkoR0jYMVg6ZYQ2E0n2CTyV08qPFmnqEdy68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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