Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6276c75ad3f0cb94f23091022f6071729ce2a2993c572a3c78e4e07ebf1d3090' 
  AND token = 'xsc7faR6IhjtIKPA+0ZajpFwthx/g3qUqFp95fGczu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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