Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4039d6bcce7926dd3f95e80a3a7f62b171fcf4cc3d30473a4350746795e2260b' 
  AND token = 'GjCNCWCSLFlxqEwkEn5RHskEWFVaQRxSzevJi7UBfxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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