Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12c85cbecd34eae75d58e15eac2284265d8990ada9d4f57829063af599202228' 
  AND token = 'TsC4pngp4lWiG1BXwt8L3+Jznw9f4u52swYJ85U/iq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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