SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dba4b4b1233e157465106f84dd074f5e2e42a05221b7260d2dc74bb2ec97d83' 
  AND token = 'RyzKrxnuVX/mJjkFn/2AkA5JtZzZWINtHvg/+x8Pjh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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