Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5cacd3ef0a9db34e8668ea39724958a2468958a7fe82c61e0f13727f86c5936a' 
  AND token = 'rWAXs+iOAcwOD9XDAlwST6o3pFRj1dKaB8PHAOFCZgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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