Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c6a2861fe837e86c3f05069bfdd2ab86c10a1e3c3d25e51ad86e39dd3c4c8d5f' 
  AND token = 'HwO5UPThiRTmDI3ECeFr0A2UdlZ4/3UVmiuAqPBUnzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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