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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '924a271598a2a84b4de22b1de5739b73b9aa93702edb616a18d77d5b7673bc4c' 
  AND token = '6s1yZncxrfOv5zMOeyn8BINLJPM+/M4OPIh8FkxmTlg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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