Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '985fa71e64d6a20a4be2a987c388f48f150dccfef3b1f4b6a04b9614e4c78d85' 
  AND token = 'i6Z03iiPX+8lpNeTDV2veQmgoufHXodMhCyIEnyOvgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}