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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff8fd0a726bdb07faf4f38a4ee25022139c3e879673ad94e3dd15e119fd933ac' 
  AND token = 'xfTr7JZEq8U3IXpYyV9bPpgUoWQtGvwW9e9mEbuyIq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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