Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0828566cd011da392df11d0563daa4c4b3c42956d4003ae4bcfd5b26e2300d6e' 
  AND token = '1B5EQQ9lzAHUOi2fQzHBNZC2GRv+QXxIecp9J+fjj1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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