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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd46f954ee533fd76179d32b7a3d6e0fe8ce8e7d91fc294fa25ac9f8d93a93580' 
  AND token = 'uvWro2kRAA+QjDtyuvM+J4h1BmaPmQkM9iFw+OgMuxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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