Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0926ec0542c62332b86b91b6497622a7727b48d6fe711c2be81b4596c22afc10' 
  AND token = 'jNBfeCcpDOY/KfZi3a7qEP9AI2lLmgTCk//smMPsR5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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