Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e570ec31b7b3d3396fa3e47585222b10b644b6c18aae1da84927d914bc41e2f5' 
  AND token = 'RxDkjWGALXsOupWaY+t4dGJjlogFGImtDSDJhH3eXeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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