SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95d7a74f41ce3f537d543c3536ccc14b8027164dcb6b73f9ac6a7191da5b2607' 
  AND token = '97eTXzRJToYjzBIYnqjjnxf5VUj1FSwFXRqYBCVYBIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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