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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a7d9ad3b882f85f2cae4a7b6aa127e9183d6690428a43c56ada51334befab9c3' 
  AND token = 'ne7pT0UHr0kCokY54K8mNcsCalGXNGcZDTJVXD6jlLM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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