Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8e07e823b4952c66f667ae12eb2a6e9c59a5fac578267335705e2800227a116' 
  AND token = 'naIgZ/Qqmn3mK6zkg4jGraYyifvnztecvvAiA7IVcoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}