Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29fea200d420c698a1e3c5f39ae2800315861ecdbd0d68836386f05090c4cf39' 
  AND token = 'GUJ9hZfQbyrDWCi2KyKegrs+t2HrGuHesi7tTFxCZak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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