Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4c45fb528fe8030277ab752cacf2eb2d0f77b364741944b08f4f0e47e2ae01ac' 
  AND token = '76TfB8kEIe8HSM2YmwdpaiB4Fn8AiDx3jdOo8jF+51A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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