SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '036bcd4cd0910fe0044425de6bfbf2309d128e6e3eab7a8b519ec860b3227127' 
  AND token = 'gh+Q4KURop+ruMuCC5wM6pnhzlxIo49QZ5CYGuwA9mE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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