Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '552d6df6e10dfae30dc446ea9cc409f87e48b0fa08203c1d9c25c3e6e5ec81ed' 
  AND token = 'K77uwDcgl966h3DbqOD7jIqjLCFMp5myBX7wq8GnbTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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