Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c84e8f2212b23227408f022230e0738e94175f5ddefb6e53d43309327322f16e' 
  AND token = '3+KeZoXYme3Cg/N/umduAJsOlZgtGltTFH4O4pVBIqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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