Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7112364e8cb46e65b32df131c97e0bff6edb44293dec93145867d61bb0f8794' 
  AND token = 'rp9rnVAL7c9pTgST2n5d54aSqG+lUGR3xrKgBPveUgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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