SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '68fff1e2b9dbabc91f5c92ea2d8b2dc7364f90ce78238de24d65f907e8532b8e' 
  AND token = 'OeCHr9HJlsxYZzDPn3dH1VPN3JX+DYgyaSM/9qNj15w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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