Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '796af059c9130f35804dd294f207033a6f2a9422286a9ec9c3e7471b94442ae6' 
  AND token = 'T6JBMJsacwdUHEkSYbhGImSjXRBmsK29EMoeSRdgnPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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