Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82ba9ccc09e0383c20a3643d6f5670d5b7bfd62b39d27dfe5c334c7e0a77ed9c' 
  AND token = 'xYQRSONRHpb8Sv7xlTgMPKjTK2ikxcAYrou657ikrc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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