Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '643d374ef200d94d40e1d47e8e4077b48734a060e17290f69bc4cbd2aef2edb5' 
  AND token = 'M/c8ZiUKkEqVqsDXhs7heyUokLM4cVN02JRaAD3wIeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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