SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '075e065d7b98951788be765c8e1252db38dfe04a45196fdad7d58f97d8c1af87' 
  AND token = 'YkzWYTYI6uvB2tU4Jf9Bv3GdtjFEhhq3Jy2BNgNfyPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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