SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7cce2b9e835dd3791043df95605dd4ee3f842dab4bb81dd75b1a7d511014da63' 
  AND token = 'njsl7iRJCLnB/YFTKejH5UZF5p8eiT2uUqV/3NAXMZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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